CN104632152B - A kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system and its method - Google Patents
A kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system and its method Download PDFInfo
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- CN104632152B CN104632152B CN201410769794.8A CN201410769794A CN104632152B CN 104632152 B CN104632152 B CN 104632152B CN 201410769794 A CN201410769794 A CN 201410769794A CN 104632152 B CN104632152 B CN 104632152B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 238000002347 injection Methods 0.000 title claims abstract description 97
- 239000007924 injection Substances 0.000 title claims abstract description 97
- 230000003190 augmentative effect Effects 0.000 title claims abstract description 25
- 230000035515 penetration Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003814 drug Substances 0.000 claims abstract description 17
- 230000009467 reduction Effects 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 10
- 230000006837 decompression Effects 0.000 claims abstract description 7
- 238000010992 reflux Methods 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000002917 insecticide Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 3
- 239000009096 changqing Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 30
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Catching Or Destruction (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to water flooding field, specifically related to a kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system and its method, flood pattern water is pressurized by centrifuging boosting water injection pump, improve water injection pressure, water injection well injection allocation requirement can be met after supercharging, solve part well injection pressure high, the problem of note is not intake；Increasing injection adding of agent is carried out by chemicals dosing plant simultaneously, medicament is entered stratum, in-place permeability is improved, reduction water injection well injection pressure reaches the purpose of decompression.The implementation of the system and method, efficiently solves Changqing oilfields extra-low-permeability reservoir high pressure and shorts problem, and pass through this method, after after water injection well injection pressure reduction, augmented injection decompression device can also be lifted to other well sites, reduce expense cost, improve the operational efficiency of equipment.
Description
Technical field
The invention belongs to water flooding field, and in particular to a kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system
And its method, it is a kind of new water injection well in oil fields augmented injection voltage reduction method.
Background technology
After the input exploitation of oil field, with the growth of recovery time, oil reservoir energy itself will be constantly consumed, and cause oil reservoir
Pressure constantly declines, and underground crude oil largely deaerates, and viscosity increase, oil well output greatly reduces, or even meeting stop-spraying stops production, and causes
Underground remains a large amount of dead oils and not adopted not come out.In order to which the underground caused by making up after crude oil extraction is in debt, oil reservoir pressure is kept or improved
Power, realizes oil field stable high yield, and obtains higher recovery ratio, it is necessary to carry out water filling to oil field, water filling be supplement stratum energy,
Ensure the effective means of oil field long term stable production.
But for some extra-low-permeability reservoirs, influenceed by reservoir properties, the water injection pressure rate of climb is fast, injects pressure
Height, Partial Block water injection well note does not enter, notes inadequate water, and very big influence is brought to oil field long term stable production.In recent years, ultra-low penetration
The exploitation in oil field has increasingly caused the concern of people.Developed ultra-low penetration oil field to China Petroleum continuing from now on
Stable development has highly important meaning.Extra-low-permeability reservoir reservoir properties are poor, and complex pore structure, porosity are low, pore throat
Radius is small, and capillary pressure is high, and matrix permeability is low, and clay mineral content is high, and reservoir sensitivity particularly water-sensitive is serious, water lock effect
It should protrude, easily cause formation damage in drilling completion and development process.In entering with ultra-low penetration waterflooding oil field
High water-cut stage, water injection well water absorbing capacity is deteriorated, and note is shorted or stopped to water injection pressure rise, part well, and stratum energy cannot
Supplement, waterflooding development effect is influenceed by serious.
For this problem, some oil fields take the individual well well stimulation such as acidifying, pressure break, and partial Pressure equipment pressure-raising increases
The means such as note carry out under-injected well improvement, although achieve certain effect, but still have that the individual well well stimulation term of validity is short, office
The problems such as portion's pressurized effect is poor.
The content of the invention
Present invention aim to address being influenceed by reservoir properties, ultra-low penetration oil-field flooding pressure is high, note is not intake asks
Topic.
Therefore, the invention provides a kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system, including chemicals dosing plant and peace
The water supercharging device come mounted in water-injection station on water pipeline, the water supercharging device includes coming on water pipeline installed in water-injection station
Water injecting pump, the water injecting pump is driven by motor, and shaft bottom is passed through after water injecting pump port of export connecting pipeline；The chemicals dosing plant includes stirring
Kettle is mixed, stirred tank bottom is passed through shaft bottom after being connected with diaphragm metering pump, the port of export connecting pipeline of diaphragm metering pump by pipeline.
Described water injecting pump is centrifugal blower-pump.
Filter is installed in described water injecting pump port of export connecting pipeline.
Ball-and-seat is installed in the port of export connecting pipeline of described diaphragm metering pump.
High-pressure stop valve is provided with the middle part of the port of export connecting pipeline of described diaphragm metering pump, high-pressure stop valve front end is set
Reflux pipeline is equipped with, the reflux pipeline other end is communicated to stirred tank.
The ultra-low penetration water injection well in oil fields augmented injection depressurizing system integral installation is provided with pipeline support in skid body, skid body
Frame.
A kind of augmented injection voltage reduction method of such as above-mentioned ultra-low penetration water injection well in oil fields augmented injection depressurizing system, including following part：
Supercharging：The water of water-injection station is by water injecting pump, and water injecting pump is done under motor driving to the water of water-injection station
Work(, makes to carry out water pressure to be incremented to specification requirement step by step；
Dosing：Increasing injection medicament is added in stirred tank and is stirred, the medicament after stirring passes through stirred tank lower end
Pipeline enters metering diaphragm pump intake, and it is consistent that the progress of increasing injection insecticide pressure is pressurized to water filling pump discharge by diaphragm metering pump；
Close note：Water from water injecting pump port of export connecting pipeline and the port of export connecting pipeline from diaphragm metering pump
Increasing injection medicament is carried out in shaft bottom in conjunction note, co-implanted high pressure under-injected well, completes the augmented injection of ultra-low penetration water injection well in oil fields
Decompression.
Beneficial effects of the present invention：This ultra-low penetration water injection well in oil fields augmented injection depressurizing system that the present invention is provided, it is overall
Equipment is function-differentiated, and functions are clearly demarcated, it is possible to achieve integral hoisting is migrated, and is easy to using in batches for different well sites, drops
Low expense cost, improves the operational efficiency of equipment；Use the increasing of this ultra-low penetration water injection well in oil fields augmented injection depressurizing system
Voltage reduction method is noted, extra-low-permeability reservoir high pressure can be efficiently solved and short problem.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is present system schematic diagram.
Fig. 2 is chemicals dosing plant structural representation.
Description of reference numerals：1st, water-injection station；2nd, water injecting pump；3rd, motor；4th, stirred tank；5th, diaphragm metering pump；6th, filter
Device；7th, ball-and-seat；8th, water injection well；9th, pipeline supporting rack；10th, skid body；11st, high-pressure stop valve；12nd, reflux pipeline.
Embodiment
For some extra-low-permeability reservoirs, influenceed by reservoir properties, the water injection pressure rate of climb is fast, injection pressure is high, portion
Blockette water injection well note does not enter, notes inadequate water, and very big influence is brought to oil field long term stable production, therefore, present invention design is a kind of
Ultra-low penetration water injection well in oil fields augmented injection depressurizing system and its method.
Embodiment 1：
A kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system is present embodiments provided, as depicted in figs. 1 and 2, including
Chemicals dosing plant and the water supercharging device come installed in water-injection station 1 on water pipeline, the water supercharging device include being arranged on water filling
Stand 1 water injecting pump 2 come on water pipeline, the water injecting pump 2 is driven by motor 3, and well is passed through after the port of export connecting pipeline of water injecting pump 2
Bottom；The chemicals dosing plant includes stirred tank 4, and the bottom of stirred tank 4 is connected with diaphragm metering pump 5 by pipeline, diaphragm metering pump 5
Shaft bottom is passed through after port of export connecting pipeline.
The water of water-injection station 1 is pressurized by water injecting pump 2, water injection pressure is improved, water injection well 8 can be met after supercharging
Injection allocation requirement, solves part well injection pressure height, the problem of note is not intake；Increasing injection medicament is carried out by chemicals dosing plant simultaneously
Add, medicament is entered stratum, improve in-place permeability, reduction water injection well injection pressure reaches the purpose of decompression.
Embodiment 2：
On the basis of above-described embodiment, water injecting pump 2 selects centrifugal blower-pump, and centrifugal blower-pump can conveniently realize pressurization
Conveying, also can vertical transport, discharge pressure is big, and transfer efficiency is high.
Filter 6 is installed, filter 6 can be carried out to the water of water-injection station 1 in the port of export connecting pipeline of water injecting pump 2
Filter, it is ensured that the water at injection well bottom you will not pollute bottom because of magazine.
Ball-and-seat 7 is installed, ball-and-seat 7 can prevent medicament from flowing back in the port of export connecting pipeline of diaphragm metering pump 5, it is ensured that
The accuracy of metering.
Further, high-pressure stop valve 11, high-pressure stop are provided with the middle part of the port of export connecting pipeline of diaphragm metering pump 5
The front end of valve 11 is provided with reflux pipeline 12, and the other end of reflux pipeline 11 is communicated to stirred tank 4, and high-pressure stop valve 11 is located at single current
The front-end position of valve 7.When the hypertonia of chemicals dosing plant Chinese medicine, high-pressure stop valve 11 ends, and medicament is with reflux pipeline 12 times
Stirred tank 4 is flow to, the waste of medicament is effectively prevent, it is ensured that the normal work of chemicals dosing plant pipeline.
Embodiment 3：
In the present embodiment, by the ultra-low penetration water injection well in oil fields augmented injection depressurizing system integral installation in above-described embodiment 1 and 2
In skid body 10, integral device is arranged in skid body 10, and being moved easily for equipment entirety can be achieved, and treats water injection well injection pressure reduction
Afterwards, augmented injection decompression device can also be lifted to other well sites, reduces expense cost, improve the operational efficiency of equipment.
Pipeline supporting rack 9 is provided with skid body 10, pipeline supporting rack 9 is used for fixed pipelines, long for some circuits
Pipeline, pipeline supporting rack 9 can be set up in position therebetween, so stability overall to equipment is highly beneficial, for entirety
Equipment stabilization in sledge dress moving process also has effect very much.
Embodiment 4：
The augmented injection voltage reduction method of ultra-low penetration water injection well in oil fields augmented injection depressurizing system described in above-described embodiment 1 to 3, including
Following part：
Supercharging：The water of water-injection station 1 is by water injecting pump 2, and water injecting pump 2 enters under the driving of motor 3 to the water of water-injection station 1
Row acting, makes to carry out water pressure to be incremented to specification requirement step by step；
Dosing：Increasing injection medicament is added in stirred tank 4 and is stirred, the medicament after stirring passes through under stirred tank 4
End pipe line enters the entrance of diaphragm metering pump 5, and the progress of increasing injection insecticide pressure is pressurized to water injecting pump 2 and exported by diaphragm metering pump 5
Unanimously；
Close note：Water from the port of export connecting pipeline of water injecting pump 2 and the port of export connecting pipeline from diaphragm metering pump 5
Increasing injection medicament carry out conjunction note in shaft bottom, in co-implanted high pressure under-injected well, complete the increasing of ultra-low penetration water injection well in oil fields
Note decompression, the purpose for making high pressure under-injected well reach not only augmented injection but also be depressured.
This augmented injection voltage reduction method of the present embodiment, can play scale inhibition, snaking, viscosity reduction, the anti-effect such as swollen, improve stratum and ooze
Low injection pressure, drops in saturating ability.Using this method of the present embodiment, tested, successfully solved super in Changqing oilfields
Low-permeability oil deposit Liu Maoyuan length 8 oil reservoir, 20 mouthfuls of high pressures short problem.
It is exemplified as above be only to the present invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (2)
1. a kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system, it is characterised in that：Including chemicals dosing plant and installed in water filling
Stand（1）The water supercharging device come on water pipeline, the water supercharging device includes being arranged on water-injection station（1）Come on water pipeline
Water injecting pump（2）, the water injecting pump（2）By motor（3）Driving, water injecting pump（2）Shaft bottom is passed through after port of export connecting pipeline；It is described to add
Medicine device includes stirred tank（4）, stirred tank（4）Bottom is connected with diaphragm metering pump by pipeline（5）, diaphragm metering pump（5）'s
Shaft bottom is passed through after port of export connecting pipeline；
Described diaphragm metering pump（5）Port of export connecting pipeline in the middle part of be provided with high-pressure stop valve（11）, high-pressure stop valve
（11）Front end is provided with reflux pipeline（12）, the reflux pipeline（12）The other end is communicated to stirred tank（4）；
The ultra-low penetration water injection well in oil fields augmented injection depressurizing system integral installation is in skid body（10）, skid body（10）On be provided with pipeline branch
Support（9）；
Described water injecting pump（2）For centrifugal blower-pump；Described water injecting pump（2）Filter is installed in port of export connecting pipeline
（6）；Described diaphragm metering pump（5）Port of export connecting pipeline in ball-and-seat is installed（7）.
2. a kind of augmented injection voltage reduction method of ultra-low penetration water injection well in oil fields augmented injection depressurizing system as claimed in claim 1, it is special
Levy and be, including following part：
Supercharging：Water-injection station（1）Water pass through water injecting pump（2）, water injecting pump（2）In motor（3）To water-injection station under driving（1）'s
Water is done work, and makes to carry out water pressure to be incremented to specification requirement step by step；
Dosing：Increasing injection medicament is added to stirred tank（4）In be stirred, the increasing injection medicament after stirring pass through stirring
Kettle（4）Lower end pipeline enters diaphragm metering pump（5）Entrance, diaphragm metering pump（5）Increasing injection insecticide pressure is pressurized to
Water injecting pump（2）Outlet is consistent；
Close note：From water injecting pump（2）The water of port of export connecting pipeline and from diaphragm metering pump（5）Port of export connecting pipeline
Increasing injection medicament carry out conjunction note in shaft bottom, in co-implanted high pressure under-injected well, complete the increasing of ultra-low penetration water injection well in oil fields
Note decompression.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410769794.8A CN104632152B (en) | 2014-12-15 | 2014-12-15 | A kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system and its method |
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| CN201410769794.8A CN104632152B (en) | 2014-12-15 | 2014-12-15 | A kind of ultra-low penetration water injection well in oil fields augmented injection depressurizing system and its method |
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| CN104632152A CN104632152A (en) | 2015-05-20 |
| CN104632152B true CN104632152B (en) | 2017-09-15 |
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| CN106337674B (en) * | 2016-08-30 | 2018-12-25 | 中国石油大学(北京) | The method for improving the fine and close oily individual well daily output |
| CN108104782A (en) * | 2018-01-10 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of long-acting augmented injection acidification technique of water injection well |
| CN108374654B (en) * | 2018-03-27 | 2023-12-26 | 中国石油天然气股份有限公司 | Intelligent water distribution device for high-pressure well and process method |
| CN108661613B (en) * | 2018-05-17 | 2021-06-11 | 大港油田集团有限责任公司 | Method for increasing injection of water injection development oil reservoir |
| CN109736795B (en) * | 2019-01-25 | 2022-05-06 | 中国石油天然气股份有限公司 | Method for judging oil reservoir property change |
| CN112576227A (en) * | 2020-11-26 | 2021-03-30 | 中国石油天然气股份有限公司 | Long-acting augmented injection method for water injection well of ultra-low permeability reservoir |
| CN115288640A (en) * | 2022-07-28 | 2022-11-04 | 中国石油天然气集团有限公司 | Pressurizing water injection device with dosing function and using method thereof |
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| CN101245699A (en) * | 2008-03-07 | 2008-08-20 | 东营市石大综合技术有限责任公司 | On-line injection profile-control and flooding-control method and device |
| CN201588621U (en) * | 2010-01-26 | 2010-09-22 | 西安长庆科技工程有限责任公司 | Intelligent type closed small-size movable water injection device |
| NO20101192A1 (en) * | 2010-08-25 | 2012-02-27 | Seabox As | Water treatment installation, method and application for removal, underwater, of at least ± one undesirable component from water |
| CN202165066U (en) * | 2011-07-25 | 2012-03-14 | 中国石油天然气股份有限公司 | Oil field water injection and chemical-adding device |
| CN202250005U (en) * | 2011-08-19 | 2012-05-30 | 中国石油天然气股份有限公司 | Depressurization and injection-increasing device for water injection well |
| CN103061730B (en) * | 2013-01-28 | 2015-09-16 | 中国石油大学(华东) | A kind of multielement hot fluid foam flooding is for coal bed methane exploring method |
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